Home / 13,218.80-19,830.36-4,898.40

Finding the Fourth Proportional to 13,218.80, 19,830.36 and 4,898.40

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Solution

The fourth proportional to 13,218.80, 19,830.36 and 4,898.40 is: 7,348.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.80 : 19,830.36 = 4,898.40 : x
  2. Step 2: Convert to fraction form
    13,218.80/19,830.36 = 4,898.40/x
  3. Step 3: Cross multiply
    13,218.80x = 19,830.36 × 4,898.40
  4. Step 4: Simplify right side
    13,218.80x = 97,137,035.42
  5. Step 5: Solve for x
    x = 97,137,035.42/13,218.80
  6. Step 6: Final answer
    x = 7,348.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.